There are ulcers on the foreskin is definitely a problem, to pay attention to a few points: First, may be the ordinary foreskin glans, this situation is generally no unclean sex, mainly is usually not pay attention to hygiene, not timely cleaning led to. Secondly, we must pay attention to whether there is syphilis infection caused by this situation suggests that we should be tested for syphilis. Third, must pay attention to whether there is herpes virus infection after local ulcerated infection. Fourth, must pay attention to exclude penile cancer, many long-term untreatable ulcers with bad odor may be penile cancer. It is recommended to go to the urology department of regular hospitals for examination, and take the corresponding tissues to do pathology tests if necessary, so that you can diagnose what kind of disease it is caused by, and then you can make the best treatment.